RPSBLAST alignment for GI: 254780355 and conserved domain: cd06118
>gnl|CDD|99871 cd06118, citrate_synt_like_1, Citrate synthase (CS) catalyzes the condensation of acetyl coenzyme A (AcCoA) and oxalacetate (OAA) to form citrate and coenzyme A (CoA), the first step in the oxidative citric acid cycle (TCA or Krebs cycle). Peroxisomal CS is involved in the glyoxylate cycle. This group also includes CS proteins which functions as a 2-methylcitrate synthase (2MCS). 2MCS catalyzes the condensation of propionyl-CoA (PrCoA) and OAA to form 2-methylcitrate and CoA during propionate metabolism. This group contains proteins which functions exclusively as either a CS or a 2MCS, as well as those with relaxed specificity which have dual functions as both a CS and a 2MCS. The overall CS reaction is thought to proceed through three partial reactions and involves both closed and open conformational forms of the enzyme: a) the carbanion or equivalent is generated from AcCoA by base abstraction of a proton, b) the nucleophilic attack of this carbanion on OAA to generate citryl-CoA, and c) the hydrolysis of citryl-CoA to produce citrate and CoA. There are two types of CSs: type I CS and type II CSs. Type I CSs are found in eukarya, gram-positive bacteria, archaea, and in some gram-negative bacteria and are homodimers with both subunits participating in the active site. Type II CSs are unique to gram-negative bacteria and are homohexamers of identical subunits (approximated as a trimer of dimers). Some type II CSs are strongly and specifically inhibited by NADH through an allosteric mechanism.. Length = 358
Score = 447 bits (1153), Expect = e-126
Identities = 166/376 (44%), Positives = 226/376 (60%), Gaps = 23/376 (6%)
Query: 44 PAFSSTASCKSKITFIDGNNGILLYRGYPIEQLSEKSDFLEVCYLLLHGELANVSQQKDF 103
P + ++ I++IDG+ GIL YRGY IE+L+EKS F EV YLLL+G+L + +F
Sbjct: 1 PGLEGVKAKETSISYIDGDEGILRYRGYDIEELAEKSSFEEVAYLLLYGKLPTKEELAEF 60
Query: 104 NDKISRHALLNENMSRFFMGFPSSAHPMAMLVSAVGALSSFYY-----SPSGVQDLEQCV 158
K++ H L E++ P +AHPM +L +AV AL SF SP +
Sbjct: 61 KKKLASHRALPEHVVEILDLLPKNAHPMDVLRTAVSALGSFDPFARDKSPEARYE----- 115
Query: 159 NVSLRMIAKISTIAAMIYKYSIGQPFVYPRSDLDYASNFLHMCFSVPCAEYQVNPLLARA 218
++R+IAK+ TIAA IY+ G + P DL YA NFL+M F + +P A+A
Sbjct: 116 -KAIRLIAKLPTIAANIYRNREGLEIIAPDPDLSYAENFLYMLFGE-----EPDPEEAKA 169
Query: 219 MNRIFILHADHEQNASTSTVRLAGSSGADPFACIAAGVACLGGRAHGGANEEALNMLMEI 278
M+ ILHADHE NAST T R+ S+ +D ++ IAA +A L G HGGANE L ML+EI
Sbjct: 170 MDLALILHADHEGNASTFTARVVASTLSDMYSAIAAAIAALKGPLHGGANEAVLKMLLEI 229
Query: 279 GSLERIPHYIMRAKDKNDPFRIMGFGHRVYRNHDPRCRIMRETMYEVLEVTGRFNDPIAQ 338
G+ E + YI K + RIMGFGHRVY+ +DPR +I++E E+ E G +D + +
Sbjct: 230 GTPENVEAYI--WKKLANKRRIMGFGHRVYKTYDPRAKILKELAEELAEEKG--DDKLFE 285
Query: 339 VAIELERIALEDEYFIERKLYPNVDFYSGITLRALGFPTNLFTVLFAVARTAGWVSQWTE 398
+A ELE IALE + +YPNVDFYSG+ +ALGFPT LFT LFAV+R GW++ E
Sbjct: 286 IAEELEEIALEVLGE--KGIYPNVDFYSGVVYKALGFPTELFTPLFAVSRAVGWLAHIIE 343
Query: 399 MIVDPSRRIGRPRQLY 414
+ R+ RPR Y
Sbjct: 344 YRENNQ-RLIRPRAEY 358